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Novel multiband ring coupler based on notch filter
Author(s) -
Yang Xiao,
Xie JunWei,
Zhang XuChun,
Liao ZhenHeng,
Zhao JieZu
Publication year - 2020
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22394
Subject(s) - telecommunications link , power dividers and directional couplers , hybrid coupler , multi band device , wideband , simple (philosophy) , band stop filter , radio spectrum , ring (chemistry) , communications satellite , engineering , satellite , computer science , telecommunications , electronic engineering , electrical engineering , physics , filter (signal processing) , antenna (radio) , low pass filter , aerospace engineering , philosophy , chemistry , organic chemistry , epistemology
Abstract A novel method for designing a multiband rat‐race ring coupler based on a notch filter is proposed. This method realizes dual‐, tri‐, quad‐, penta‐, … band characterizes of coupler using the same structure, two additional branches. So, it has three advantages: (a) simple structure even the number of working bands more than four; (b) achieving the different numbers of working bands with just one structure; (c) useful for almost any kind of wideband passive components because it views them as black boxes. Three prototypes, a tri‐band ring coupler (Global System for Mobile Communications 0.9 GHz, Digital Communication System 1.8 GHz, Industrial Scientific Medical 2.45 GHz), a quad‐band ring coupler (Time Division Long‐Term Evolution 2.3 GHz, Satellite C‐Band Downlink 3.8 GHz, Aeronautical Radio Navigation 4.3 GHz, and Satellite C‐Band Uplink Applications 6.3 GHz) and a penta‐band ring coupler (Frequency Division Long‐Term Evolution [LTE‐FDD] 0.9, 1.4, 1.8, 2.3, and 2.6 GHz), are simulated and measured. They all use the same structure but different parameters of the added branch. The results validate the functionality of the coupler. The method of designing multiband devices in this study can be used for other passive devices, and the structure is simple.